Chemical characteristics and in situ ruminal parameters of barley for cattle: Comparison of the malting cultivar AC Metcalfe and five feed cultivars

Kenton J. Hart*, Brian G. Rossnagel, Peiqiang Yu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Citations (SciVal)

Abstract

The objective of this study was to compare the most widely grown barley
cultivar in Canada, AC Metcalfe, a malting type barley, with five feed
cultivars. Barley cultivars were grown at one location during 3
consecutive years and barley samples were milled to pass through a 1-mm
screen and analysed to determine nutritive value. Additional samples
were passed through a roller mill with a gap set at 1.12 mm and
incubated ruminally for 0, 2, 4, 8, 12, 24, and 48 h in 3 dry Holstein
cows fitted with rumen cannulae. The rate and extent of rumen digestion
were estimated. AC Metcalfe had a higher (P < 0.001) concentration of NDF, and lower (P< 0.05) concentrations of non structural carbohydrates, starch, ADF,
total digestible nutrients, and fermentable cell wall carbohydrates
compared with the mean of the feed cultivars. The malting cultivar had a
higher (P < 0.001) soluble DM fraction, lower (P < 0.05) CP and starch degradation rates, and a lower (P< 0.001) ruminally degradable starch concentration compared with the mean of the five feed cultivars. The results demonstrate that there are only small differences in terms of chemical composition and in situ degradation kinetics between the malting cultivar AC Metcalfe and the five feed cultivars of barley reported here.

Original languageEnglish
Pages (from-to)711-719
Number of pages9
JournalCanadian Journal of Animal Science
Volume88
Issue number4
DOIs
Publication statusPublished - Dec 2008

Keywords

  • DIETS
  • Barley
  • FINISHING STEERS
  • PROTEIN
  • HULLESS BARLEY
  • DVE/OEB-SYSTEM
  • protein
  • CORN
  • DAIRY-COWS
  • ruminants
  • STARCH DIGESTION
  • DETERGENT FIBER
  • energy
  • RUMEN DEGRADATION CHARACTERISTICS

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